xfree86 man page for deb-preinst

deb-preinst(5)							    dpkg suite							    deb-preinst(5)

NAME
       deb-preinst - package pre-installation maintainer script

SYNOPSIS
       preinst

DESCRIPTION
       A  package  can	perform  several  pre-installation  actions via maintainer scripts, by including an executable preinst file in its control
       archive (i.e. DEBIAN/preinst during package creation).

       The script can be called in the following ways:

       new-preinst install
	      Before the package is installed.

       new-preinst install old-version new-version
	      Before removed package is upgraded.

       new-preinst upgrade old-version new-version
	      Before the package is upgraded.

       old-preinst abort-upgrade new-version
	      If postrm fails during upgrade or fails on failed upgrade.

SEE ALSO
       dpkg(1).

1.19.0.5							    2018-04-16							    deb-preinst(5)